patch 8.2.3631: "syntax enable" does not work properly in Vim9 context Commit: https://github.com/vim/vim/commit/c8a9fe541d3bee36d2760ed156997ddbb0142ee1 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Nov 20 19:50:59 2021 +0000 patch 8.2.3631: "syntax enable" does not work properly in Vim9 context Problem: "syntax enable" does not work properly in Vim9 context. Solution: Also handle Vim9 context. (closes https://github.com/vim/vim/issues/9161)

/^CFLAGS[[:blank:]]*=/s/$/ -Wall -Wextra -Wshadow -Werror/
/^PERL_CFLAGS[[:blank:]]*=/s/$/ -Wno-error=unused-function/